🌐 Mailman 3 July 2011 - Python-list - python.org

Re: how to call a function for evry 10 secs
by Ulrich Eckhardt July 1, 2011

July 1, 2011

Dennis Lee Bieber wrote: > And that was a direct cut&paste from a command window; showing it > had slept for some 90 seconds before I killed it. Interesting. Just tried a 2.7.2 on a 32-bit MS Windows with following results: 1. sleep(5 - 2**32) sleeps for a few seconds 2. sleep(-1) sleeps much longer So this seems to confirm that it's a 32-bit underflow while preparing the argument for win32's Sleep() function. That said, an "IOError" is a bit better but still leaves room for improvement. I'll take this to the developers mailinglist and see if they consider the behaviour a bug. At the very least the docs are bad, I would say. Cheers! Uli -- Domino Laser GmbH Geschäftsführer: Thorsten Föcking, Amtsgericht Hamburg HR B62 932

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treeviewcontrol in tkinter.ttk
by Wolfgang Meiners July 1, 2011

July 1, 2011

Hi all, when i type the following code under python3, version 3.2 using osx 10.6.8: ############################################################## #! /usr/bin/env python3 # -*- coding: utf-8 -*- from tkinter import * from tkinter.ttk import * from tkinter.font import Font root = Tk() tv = Treeview(root, columns=['ad1', 'ad2']) tv.pack() tv.heading('#0', text='tree label', anchor=E) tv.column('#0', anchor=E) tv.heading('ad1', text='additional info 1', anchor=E) tv.column('ad1', anchor=E) tv.heading('ad2', text='additional info 2', anchor=E) tv.column('ad2', anchor=E) nd = tv.insert('', 'end', text='left aligned', values=['right aligned', 'right aligned']) tv.column('#0', width=Font().measure('left aligned')) for l in ['#0', '#1', '#2']: print('column %s \nheading options: %s \ncolumn options %s' % (l, tv.heading(l, option=None), tv.column(l, option=None))) root.mainloop() ############################################################## i get the following output: column #0 heading options: {'tate': '', 'text': 'tree label', 'image': '', 'command': '', 'anchor': 'e'} column options {'minwidth': 20, 'width': 200, 'id': '', 'anchor': 'e', 'stretch': 1} column #1 heading options: {'tate': '', 'text': 'additional info 1', 'image': '', 'command': '', 'anchor': 'e'} column options {'minwidth': 20, 'width': 200, 'id': 'ad1', 'anchor': 'e', 'stretch': 1} column #2 heading options: {'tate': '', 'text': 'additional info 2', 'image': '', 'command': '', 'anchor': 'e'} column options {'minwidth': 20, 'width': 200, 'id': 'ad2', 'anchor': 'e', 'stretch': 1} showing that all elements should be right aligned (anchor:'e'). Nevertheless, all headings are centered, the tree label is left aligned while the rest is right aligned. This is not what i would expect. Additional, the column width of the tree label is to small, one charakter is missing. Can someone explain to me, how to do this the right way? Thank you for any hints Wolfgang

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Safely modify a file in place -- am I doing it right?
by steve+comp.lang.python＠pearwood.info July 1, 2011

July 1, 2011

I have a script running under Python 2.5 that needs to modify files in place. I want to do this with some level of assurance that I won't lose data. E.g. this is not safe: def unsafe_modify(filename): fp = open(filename, 'r') data = modify(fp.read()) fp.close() fp = open(filename, 'w') # <== original data lost here fp.write(fp) fp.close() # <== new data not saved until here If something goes wrong writing the new data, I've lost the previous contents. I have come up with this approach: import os, tempfile def safe_modify(filename): fp = open(filename, 'r') data = modify(fp.read()) fp.close() # Use a temporary file. loc = os.path.dirname(filename) fd, tmpname = tempfile.mkstemp(dir=loc, text=True) # In my real code, I need a proper Python file object, # not just a file descriptor. outfile = os.fdopen(fd, 'w') outfile.write(data) outfile.close() # Move the temp file over the original. os.rename(tmpname, filename) os.rename is an atomic operation, at least under Linux and Mac, so if the move fails, the original file should be untouched. This seems to work for me, but is this the right way to do it? Is there a better/safer way? -- Steven

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text file
by Siboniso Shangase July 1, 2011

July 1, 2011

Hi i m very new to python and i need hepl plz!! i want to type this data in a text file it the same the diffrence is the number that only increase and i canot write this up myself since it up to 5000 samples Data\ja1.wav Data\ja1.mfc Data\ja2.wav Data\ja2.mfc Data\ja3.wav Data\ja3.mfc Data\ja4.wav Data\ja4.mfc . . . . Data\ja(n).wav Data\ja(n).mfc Data\ma1.wav Data\ma1.mfc Data\ma2.wav Data\ma2.mfc Data\ma3.wav Data\ma3.mfc Data\ma4.wav Data\ma4.mfc . . . Data\ma(n).wav Data\ma(n).mfc

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